Antiskidding device for tires.



G. J. ADAM. ANTISKIDDING DEVICE FOR TIRES.

APPLICATION FILED APR, 25, 1910 Patented Jan. 9, 1912.

2 SHEETS-SHEET l @901 eJJf aaflz/ fi'drm- G. J. ADAM.- ANTISKIDDING DEVICE FOR TIRES.

APPLICATION FILED APR. 25, 1910.

Patented Jan. 9, 1912.

2 SHEETSSHBBT 2 I part of this specification-3 srn'rsjrn'fonnron nn'rrsxrnnme nrivroa non Application filed April 25,

- Specification otjlbetters Yatent.

1910. serial no. 557,329.

Tacll whom it may concern:

Be it known that I, GEORGE J. 'ADAM, a citizen of the United States,and a resident of Chicago, in the county of 600k and State. of Illinois, have invented certain new and useful Improvements in Antiskidding Devices for Tires; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a This inventlon relates to improvements in anti-skidding tread devices for yielding tires, such as pneumatic cushion or soft rub ber tires," anidparticularly to improvements in that type of suei'lkdevices in which tough,

non-metallic, flexible pads, such, forexample, as leather pads are provided for inducing friction between the-tire and theroad. As at present constructed, anti-skidding tread devices provided with such pads are not readily renewable in single parts, as,

' for example, ,by substituting a single new pad'for an old, Worn pad, and the object of my invention is to provide the antifriction tread device with an attaching mechanism for the pad which serves as an etficient, means for retaining it in proper position when in .use, and .alsoprovides a simple and economical means for renewing the pads singly when they have become worn.

The invention consists in the combination of elements hereinafter described and more particularly pointed out in the appended claims. v

In the drawings :-Fi re 1 is a side elevation of a portion of'a tire, showing an'antiview of one of the of Fig.

skidding device in place thereon provided with my improved pad retaining means. Fig. 2 is atop plan view off-the anti-skidding tread device. Fig. 3 5 s a bottom plan s showing. the means by which the pad'fis' attached. Fig. 4 is a top plan view of the pad itself. Fig. 5 is a longitudinal section'through one end of the pad and its attaching'means on the line 5-5 3. Fig. 6 is a transverse-section through Fig. 3 onthelline 6- 6 thereof. Fig. 7 is a transverse section through Fig. 3 on the line 7-7 .thereof.-- Fig. 8 is a top plan view of a pad provided with a slightly modified form of attaching means. Fig. 9 is a top plan' view of the same with the pad removed. Fig. 10 is a partial section Fig. 11 is a section through Fig. 10 on the line 1111 thereof. Fig; 12 is a perspec; tive view of a locking cam lever adapted to draw together'and lock the ends-of the peripheral chains to which the anti-skidding pads are connected. Figs. 13 and 14 are side Patented Jan. 9,1912

elevation of parts .of' thetire and wheel felly illustrating the: .iflerent stages inthe operation of said cam j ever look. Fig. 15 is an enlarged top plan view of one of the spring connections by which the peripheral chains are connected. Fig. 16 is a perspective-view of the'clip by means ofwhich'the' retaining plate is'connected to the link mem- EbBIIS'WhICh in turn are connected to the perifpheral 'chains. Fig. .17 isa top plan view 0 pa -A indicates atire and B an'anti-skidding device provided with a plurality of pads B secured'to link members E, which link mem a. retaining plate for a modified form of bers are secured at regular intervals to links I .of peripheral chains E two link members of adjacent pads being secured to the same .link of said peripheral chain, as indicated in Fig. 1. Said pads B are usuallymade of leather or of any other suitable non-metallic, tough, flexible material which tends to induce friction.

lieeach end of a pad and serve to retain it in C indicates'retaining plates which under- I place in the assembled anti-skidding device.

.The retaining late is preferably made of sheet metal an is of the general form and dimension of the end B of the anti-skidding p d. It is provided about its ends with upt rned'fianges 0 against which'the end margins of the pad abut when the pad is in po- ,sition. Said'fianges take up tlie'thrust of the pad when its frictional engagement.

- with the road tends to displace or dislodge it and also serveanother purpose which will presently appear.

D represents a clip (Figs. 5 and 16) for attaching the retaining plate. to the link members E and by means of which there taining plate is. secured in the assembled anti-skidding device.- Said clip is formed from a sheet of thin metal bent uponitself ,and provided at its lower side with an anchor plate 01 and onits upper side with a washer extension d.' The anchor plate (5 is preferably. circular in form and rests in a I similarly formed depression 0 inthe outer end ofthe retaining plate andhbiits with its edges against the upturned flanges '0.

l The two members of the clip embrace the into position. It is apparent that'by the end of the pad, one lying below it and the construction of the anchor plates d of the clip D and its engagement with the upturned flanges a, a strong connection is made between the link member E and the retain; .ing plate,'and little or no strain is exerted on the bolt or rivet by means of which the pad is secured to the plate. The inner ends of the plates are secured to the pad by rivets G '(Figs. 5 and 7) which have split shanks 9 'adapted to be spread apart against the underside of the retaining plate. Said rivets have heads in the form of studs 9 which tend to protect the pad without interfering with the anti-skid character of the pad; preferably several of said rivets are secured to the body of the pad, as indicated at G When it is desired to'remove a pad and replaceit by a fresh one the anti-skidding device is removed from the tire, or loosened so that the underside of the pad to be re-' moved may be gotten at, the rivets F are removed and the worn pad, including its retaining plates, is detached from the clips D. A new pad with retaining plates held in position on its ends by the rivets G is then applied to the-clips, with. the washers d and the anchor plates d embracing its ends, and the anchor plate in the depression 6 The outer end of the retaining plate C is depressed as indicated at a a depth equal in thickness to the anchor plate (1 of the clip in order to provide a continuous smooth surface for the ends of the pad B Such de-' pressions are not essential but theyare preferable in order that the underside of the pad may not be unnecessarilyworn' at this In Figs. 8 tell, inclusive, I have shown a modifica ion of my invention, in which the retaining platesinstead of being. formed simply to underliethe ends of the pad, are connected together by a central web so. as

to form a single plate underlying the entire .1 pad. In saidfigures- (l -indicates the retaining plates and C the. central connecting web which underlies the main body of the pad B"; Theconstruction'is- "otherwise the same as that above described except that in this case there Is no necessityefor the rivets G. I have also shown, in Figs. 10 and 11,

another device for locking' the clip which comprises small bolt J inserted from the underside ol: the retaining plate and pro link until the ends of the chain are vided at its upper end with an internally to receive a cappedscrew-threaded recess screw J The retaining plates maylbe used with pads of any'shape. For example, the pad shown in Fig. 17 isa straight pad, while in the other figures-of'the drawings shown are X-shaped. In case a web connecting the. several retaining plates for a pad is used, said-web is, made to conform to the shape of the pad.

.At several points in'theperiphery of the anti-skidding device are located elastic links of any convenient type, as, for example, that indicated at M in Figs, land 15. Said link comp-rises oppositely disposed hook members m, m, arranged in longitudinally movable relation to each other and pro vided with opposing shoulders m m, between which engages a coiled spring m Said spring yieldingly resists any elongation of the member. The spring links give the pads e enough elasticity to the peripheral chains E to permit the attachment of the antiskidding device to the tire without danger ofthe chain being loose thereon.

In order that there may be a nicefitthe ends of the chains E must just meet, and

it requires considerable force to draw said ends together.

drawing the loose ends of the chain together and'ifor locking them in that position. It is preferably made of heavy wire so as to have the necessary rigidity and p The cam lever N shown in 'Figs. 1, 12, 13 and 14, is for the' purpose of consists of a curved member-n which may be called a cam member; an eye a by means of which it is attached toan end link of the chain, and which is located at one end of'the cam member; and a locking member n located atthe opposite end of said cam member. Thelocking member is in the form of a hook in aplane at an angle, preferably a right. angle, to the plane of the members at and W. The cam member n comprises a main long curve n and a' short sharp curve n. v

The operation of the device is'as follows:

The eye 11. is connected to a link a: atone of the loose ends of the chainand the hookn jis inserted through a link y at the other end of the' chain; it being necessary to draw these twolinks together. -The hook;

'nis then pulled downward andtowii'rd the 'link attached to the eye 91}, the long curve n facilitating this. movement and permit ting the cam member at to slip throu h/the awn into the position indicated in. Fig. 14. The

device is then moved into the position indi cated in Fig. 1, in which the link g has come to rest in the sharp bendn of the cam mem- The hook n. is attached 'to one of the links .of thechain, as indicated inFig. lwhich her in line withf-the link :1? in the eye n loclzs thedevice in place. When removing the anti-skidding device the operation is reversed.

I prefer to provide frictional engagement of .the underside'of the pad with the plate C and to this end short prongs or spurs arechipped out and-raised from the surface of the plate and turned upward to engage the under face of the pad, as indicated at (See Fig. 9). .Said prongs are made just long enough toprick into the underside of the padto prevent itfrom sliding on the upper face of 'the retaining late at points intermediate of its ends. Iii the case of very thin metal forming; the plates, the chipping of the I surface extends clear through the plate and amounts'to a cut, or

the prongs or spurs may be formed in 'iany other convenient manner.

I c1a1m as my 1nvent1on:

1. In ananti-skidding device provided with tough, non-metallic, flexible,' frictioninducing pads, a retaining plate adapted tounderlie the end of a pad, said' retaining plate being provided with upturned flanges extending about one end adapted to engage the'edgesof the pad, and means for attaching the pad to the retaining plate.

2. In an anti-skidding device provided with tough, non-metallic, flexible, frictioninducing pads, a retaining plate adapted to underlie the end of a pad, said retaining plate being provided with upturned flanges extending about one endadapted to engage the edges of the pad, anchoring means for the retaining plate comprising a clip having upper and lower extensions adapted to embrace, respectively, vthe top and bottom of the end of the pad, the lower extension lying upon the upper face of the retaining plate, and means for securing said clip in place. i

3. In ang-ant-i l skidding device. provided with tough; *non-metallic, flexible, frictioninducingpads, a retaining plate adapted to underlie the end of a pad, said retaining plate being provided with upturned flanges extending' aboutone end adapted to engage the edges .of the pad, a clip provided-with an anchor plate overlying the retainingplate and adapted to engage the .underside of the en of the pad andto abut at its edges nagainst s id upturned flanges, a washer formed on said clip adapted to overlie the end-of the pad,and means for removably securing said clip, pad and plate together.

retaining plate 4. In an anti skidding device provided with tough, non-metallic flexible, frictioninducing pads, a retaining plate adapted to underlieand sup ort the end, of a pad, said eing provided with upturned-flanges extending about one end and adapted to engage the'edges of the pad adt "jacent its end and having a' depression formed at said clip provided with a rojecting anchor plate ,gidapted to lie within the depression form (1 in theendof theretaining plate and to abut at its edges against the upturned flangesformed on'said retaining plate, a? washer formed on said clip adapted to overlie the end of said pad,

and means for removably securing the ends of said clip, pad and. retainin gplate together. w

5. In 'an'ant-i-skidding device provided withtough, non-metallic, flexible, frictioninducing pads, a retaining plate adapted to underlie and support the end of a pad, a clip provided with an anchor plate overlying the end of the retaining plate and adapted to engagethe underside'of the end of the pad, a washer formed ,on said clip adapted to overliethe end of the pad, and means for removably securing said clip, pad and plate togethen.

' 6. In an anti with tough, non-metallic, flexible, frictioninducing pads, a retaining (plate adapted to skidding device provided underlie and support the end of a pad, a

'clip provided with an anchor plate overlying the end of the retaining plate and adaptedto engage the underside of theend of the ad, a washer formed on said clip adapted to overlie the end of the pad, a 'rivet extendin through said washer, pad, anchor plate an retaining plate adapted to removably secure said parts together, and supplemental means adapted to secure the inner part of'said 'rc/ taining plate to said .pad.' 8. In an anti skidding device provided inducing pads, a set of retaining plates for each pad adapted to underlie and support with tough, non-metallic, flexible, frictionthe ends of the pad, a central web or plate connectingsaid retaining plates and under lying the main body of the pad, said central plate having short upward prongs formed on its upper surfaces near its middle adapted to engage the under surfaceof the pad, clips provided with anchorv plates overlyi the outer ends of the retaining plates an a adapted to engage the underside of the ends of the pad, washers formed on said clips adapted to overlie the ends of, the pad, and means for removabl securing said clips, the ends, ithe pad an theretaming plates. together. t 9. In an antiskidding device provided with .tough, non-metallic, flexible, frictioninducing pads, a set of retaining plates for each pad including a retaining late for each end of saidlpadsfeach-retainmg plate .-being.. adapted to underlie and support the end of'the'pad, a set of clips one for each retaining plate, each clip. being provided with an anchor plate'overlying the end of the retaining plate and being. adapted to engage the underside of the e'nd'of the pad, and

' with a ,washer formedon saidclip adapted to overlie the end oft-he pad, means for removably securing each clip and end of the.

pad, and the retaining plate together, and 15.

supplemental means for securing the inner part of the plateto the pad; 7

'10; fIn" an anti skidding: device provided with; tough, -non-metallic, .fle'xible, frictioneach'endo f'said pads, each retaining plate inducing-pads, aset of retaining plates for each pad'inclu ding a retaining plate for a 5 mm being adapted to underlieand support the end of the pad, a set of clips, one for each retaining p ate, each clip being provided -with an an hor plate overlying the end of the retaining plate and being adapted to engage the underside of the end of the pad, and with a washer formed on said clip adapted tq-overlie theend of the. pad, means for removably securing each clip and end of the pad, and-the retaining plate together, and'a'cent-ral. plate 'or web underlying the body of the pad and connecting said retainiilg plates;

- In testimony that I, .cla im the foregoing as my invention I aflix my signature in the presenceoftwo witnesses, this 15th day of 

